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8N Pull type Ignition Switch

L

luv2wrench

Member
I need to replace my push/pull type ignition switch on my early 8N (serial 190). Does Napa offer a decent style or is there a better one out there? Is a Key the way to go? Tractor shuts off time to time. Has no spark until you do the ole tap test on the switch and then it fires right up. Tractor has a 8 volt battery in it and a SI10 alternator on it. seems to work fine??? I just replaced points (.015"), condenser, coil, dist. cap & rotor, copper wires, Autolites 437 (.025"), new fuel filter screen in bowl, carb gets plenty of fuel and tractor purrs like a kitty while running.

Thanks experts.

luv2wrench, ret.
a235813.jpg
 
" I need to replace my push/pull type ignition switch on my early 8N (serial 190)."

That's interesting. Never seen anything like that. I'm pretty sure it's an after-market replacement & not OEM.....but John Smith or some of the restoration guys would know for sure. Regardless, don't toss it!

As to a replacement, this is all I use: NAPA: p/n ECH KS6041. Pricey, but you will never buy but one.

" Tractor has a 8 volt battery in it and a SI10 alternator on it."

Done any work on that alternator? As in reducing it's output? Because it should be putting out 14.5 volts needed to charge a 12v battery. I'm surprised it hasn't boiled the battery over.
75 Tips
 
this tractor is new to me, as I am fixing it for my uncle. Its been like this for years. I will throw my fluke on it next time im around it and check what its charging at.

So this very early 8n should have a key??

and it mounts in this position??
 
" So this very early 8n should have a key??"

To the best of my knowledge, yes.

But........

I'm not a restoration expert. Some others around here are & will be able to tell you soon.
75 Tips
 
so I should just put the 2 position NAPA key switch in for what I have pictured, KS6040?? And from what I have read, with this style of on/off ignition switch I probably have a 1 wire SI10 alternator??

Or is the 3 position switch a better switch? (KS6041 the one you meationed) And can be used like the 2 position switch with just not using the ACC terminal?

I did see a resistor block under the battery box area, but didn't pay much attention to what alternator set up I have is. I just assume it is a 1 wire due to the switch I have pictured.

Again battery is the 8 Volt style. The Coil I replaced appeared to be a 6V. I did put a 6 volt coil back on it.
 
Are you sure its a 8N with a SN of 190 that should make it a 9N, how about posting some pictures of the tractor.
 
As for the alternator it could have a 6 volt regulator in it thus its not cooking the 8 volt battery cause I think 14.2 volt would boil and 8 volt dry in a few hrs.
GB in MN
 

"Are you sure its a 8N with a SN of 190 that should make it a 9N"

N serial numbers were reset with the introduction of the 8N. 190 would have been built sometime during the second half of 1947.
 
Ok good to know, I tried searching but didn't find a good 8N sn list guess I should have looked more.
GB in MN
 
I'm 99% certain all 8ns had key switches. Push pull switches can be found at any auto parts store.

It is mounted in the correct location. That big flat washer is a dead give away that the switch is not original.

You could even use a .99 light switch. Just let it hang on the wires.

I'd be looking into the battery and alternator setup.
 
I will post a pic when I get back to the tractor. The engine block casting next to the serial casting states 8N and to the right of that states 190
in a another casting.

So this would make it the 190th 8n made???
 

i am confused by your description. the serial number is in one spot, not two.

i don't know what u mean by "another casting". there is a flat spot at the top of the block, toward the rear of the tractor from where the oil filter mounting bracket is. the entire serial number will be on that flat spot. it will start with 8N, and then the rest of the serial number will follow immediately after the N.

at this point, i'm thinking a picture might be very helpful.

u might also have a look at this page for a better description, with pictures.
 
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